Postage rates for domestic mail and international airmail services will be revised from December 18.
Singapore Post on Friday said postage rates would be increased to 25 cents, from the current 23 cents, for domestic mail weighing 20 grammes or less.
International airmail postage rates will go up by between 5 and 40 cents.
Postage fees for registered mail will see an increase of 20 cents, from S$2 to S$2.20.
Singapore Post said local stamp rates were last revised 11 years ago, while international postage rates were last revised six years ago.